package com.itheima.controller.report;

import com.itheima.constant.MessageConstant;
import com.itheima.entity.Result;
import com.itheima.service.member.MemberService;
import com.itheima.service.setmeal.SetmealService;
import com.itheima.service.report.ReportService;
import org.apache.dubbo.config.annotation.Reference;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.OutputStream;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.util.*;

/**
<<<<<<< HEAD
 * @Author: 杨雅雯
 * @Date: 2021/11/4 13:46
 */
/**
 * @author 陈英航
 * @since 2021/11/4 16:46
 */
/**
 * @author 林金洋
 * @since 2021/11/4 15:22
 */
@RestController
@RequestMapping("/report")
public class ReportController {
    /**
     * 一年中的月份数
     */
    private static final int MONTH_LENGTH = 12;

    @Reference
    private ReportService reportService;

    @Reference
    private SetmealService setmealService;

    @Reference
    private MemberService memberService;

    @GetMapping("getSetmealReport")
    public Result getSetmealReport(){
        List<Map<String, Object>> setmealCount = setmealService.findSetmealCount();

        Map<String,Object> map = new HashMap<>();
        map.put("setmealCount",setmealCount);

        List<String> setmealNames = new ArrayList<>();
        for(Map<String,Object> m : setmealCount){
            String name = (String) m.get("name");
            setmealNames.add(name);
        }
        map.put("setmealNames",setmealNames);

        return new Result(true, MessageConstant.GET_SETMEAL_COUNT_REPORT_SUCCESS,map);
    }

    /**
     * 运营数据统计
     * @return 返回运营数据统计显示在页面上
     */
    @RequestMapping("/getBusinessReportData")
    public Result getBusinessReportData(){
        try {
            Map<String,Object> data= reportService.getBusinessReportData();
            return new Result(true, MessageConstant.GET_BUSINESS_REPORT_SUCCESS,data);
        }catch (Exception e){
            return new Result(false, MessageConstant.GET_BUSINESS_REPORT_FAIL);
        }
    }

    /**
     * 导出运营数据
     * @return 导出一份运营数据的下载表
     */
    @RequestMapping("/exportBusinessReport")
    public Result exportBusinessReport(HttpServletRequest request,HttpServletResponse response){
        try {
            // 获取数据
            Map<String,Object> result= reportService.getBusinessReportData();

            //取出返回结果数据，准备将报表数据写入到Excel文件中
            String reportDate = (String) result.get("reportDate");
            Integer todayNewMember = (Integer) result.get("todayNewMember");
            Integer totalMember = (Integer) result.get("totalMember");
            Integer thisWeekNewMember = (Integer) result.get("thisWeekNewMember");
            Integer thisMonthNewMember = (Integer) result.get("thisMonthNewMember");
            Integer todayOrderNumber = (Integer) result.get("todayOrderNumber");
            Integer thisWeekOrderNumber = (Integer) result.get("thisWeekOrderNumber");
            Integer thisMonthOrderNumber = (Integer) result.get("thisMonthOrderNumber");
            Integer todayVisitsNumber = (Integer) result.get("todayVisitsNumber");
            Integer thisWeekVisitsNumber = (Integer) result.get("thisWeekVisitsNumber");
            Integer thisMonthVisitsNumber = (Integer) result.get("thisMonthVisitsNumber");
            List<Map> hotSetmeal = (List<Map>) result.get("hotSetmeal");

            // 动态获取report_template.xlsx表格的绝对路径
            String filePath=request.getSession().getServletContext().getRealPath("template")+File.separator+"report_template.xlsx";
            // 基于提供的Excel模板文件在内存中创建一个Excel表格对象
            XSSFWorkbook excel=new XSSFWorkbook(new FileInputStream(new File(filePath)));
            // 读取第一个工作表
            XSSFSheet sheet = excel.getSheetAt(0);

            XSSFRow row = sheet.getRow(2);
            row.getCell(5).setCellValue(reportDate);//日期

            row = sheet.getRow(4);
            row.getCell(5).setCellValue(todayNewMember);//新增会员数（本日）
            row.getCell(7).setCellValue(totalMember);//总会员数

            row = sheet.getRow(5);
            row.getCell(5).setCellValue(thisWeekNewMember);//本周新增会员数
            row.getCell(7).setCellValue(thisMonthNewMember);//本月新增会员数

            row = sheet.getRow(7);
            row.getCell(5).setCellValue(todayOrderNumber);//今日预约数
            row.getCell(7).setCellValue(todayVisitsNumber);//今日到诊数

            row = sheet.getRow(8);
            row.getCell(5).setCellValue(thisWeekOrderNumber);//本周预约数
            row.getCell(7).setCellValue(thisWeekVisitsNumber);//本周到诊数

            row = sheet.getRow(9);
            row.getCell(5).setCellValue(thisMonthOrderNumber);//本月预约数
            row.getCell(7).setCellValue(thisMonthVisitsNumber);//本月到诊数

            int rowNum = 12;
            for(Map map : hotSetmeal){//热门套餐
                String name = (String) map.get("name");
                Long setmeal_count = (Long) map.get("setmeal_count");
                BigDecimal proportion = (BigDecimal) map.get("proportion");
                row = sheet.getRow(rowNum ++);
                row.getCell(4).setCellValue(name);//套餐名称
                row.getCell(5).setCellValue(setmeal_count);//预约数量
                row.getCell(6).setCellValue(proportion.doubleValue());//占比
            }

            // 使用输出流进行表格下载，基于浏览器作为客户端下载
            OutputStream out = response.getOutputStream();
            // 向客户端声明，写入的是什么类型的文件
            // "application/vnd.ms-excel" ：代表的是excel文件类型-固定写法
            response.setContentType("application/vnd.ms-excel");
            // 设置响应头信息，指定以附件形式下载
            // attachment：附件
            response.setHeader("content-Disposition", "attachment;filename=report.xlsx");

            excel.write(out);

            out.flush();
            out.close();
            excel.close();

            return null;
        }catch (Exception e){
            return new Result(false, MessageConstant.GET_BUSINESS_REPORT_FAIL);
        }

    }

    /**
     * 会员数量统计（折线图）
     * @return X轴年份，Y轴的会员数量
     */
    @GetMapping("getMemberReport")
    public Result getMemberReport(){
        Map<String,Object> map = new HashMap<String,Object>(10);
        List<String> months = new ArrayList<>();
        //获取日期对象,为当前时间
        Calendar calendar = Calendar.getInstance();
        //获取过去第12个月的月份
        calendar.add(Calendar.MONTH,-12);
        for (int i = 0; i < MONTH_LENGTH; i++) {
            //获得当前时间往后推一个月
            calendar.add(Calendar.MONTH,1);
            Date date = calendar.getTime();
            months.add(new SimpleDateFormat("yyyy-MM").format(date));
        }
        map.put("months",months);

        List<Integer> memberCount = memberService.findMemberCountBeforeMonth(months);
        map.put("memberCount",memberCount);
        return new Result(true, MessageConstant.GET_MEMBER_NUMBER_REPORT_SUCCESS,map);
    }
}
